Table 5.

Factors associated with COVID-19 among the contacts stratified by the symptomatic status of the primary cases of Tamil Nadu, India, March–May 2020

Symptomatic primary	Type of contacts	Crude RR (95% CI)	Adjusted RR with age and sex (95% CI)
Yes	Community contacts of non-congregation primary cases	Ref.	Ref.
	Community contact of congregation primary cases	10.5 (6.0 to 33.0)	8.6 (2.6 to 29.1)
	Household contacts of non-congregation primary cases	15.5 (6.0 to 39.8)	14.6 (5.7 to 37.7)
	Household contacts of congregation primary cases	26.7 (10.8 to 65.9)	25.3 (10.2 to 63.0)
No	Community contacts of non-congregation primary cases	Ref.	Ref.
	Community contact of congregation primary cases	0.9 (0.6 to 1.4)	0.9 (0.5 to 1.3)
	Household contacts of non-congregation primary cases	4.6 (3.5 to 6.0)	4.4 (3.4 to 5. 8)
	Household contacts of congregation Primary cases	16.48 (13.17 to 20.63)	16.52 (13.16 to 20.74)

RR, relative risk.